#ifndef client
#define client
#include <func.h>

typedef struct
{
	unsigned int count[2];
	unsigned int state[4];
	unsigned char buffer[64];   
} MD5_CTX;

#define F(x,y,z) ((x & y) | (~x & z))
#define G(x,y,z) ((x & z) | (y & ~z))
#define H(x,y,z) (x^y^z)
#define I(x,y,z) (y ^ (x | ~z))
#define ROTATE_LEFT(x,n) ((x << n) | (x >> (32-n)))

#define FF(a,b,c,d,x,s,ac) \
{ \
	a += F(b,c,d) + x + ac; \
	a = ROTATE_LEFT(a,s); \
	a += b; \
}
#define GG(a,b,c,d,x,s,ac) \
{ \
	a += G(b,c,d) + x + ac; \
	a = ROTATE_LEFT(a,s); \
	a += b; \
}
#define HH(a,b,c,d,x,s,ac) \
{ \
	a += H(b,c,d) + x + ac; \
	a = ROTATE_LEFT(a,s); \
	a += b; \
}
#define II(a,b,c,d,x,s,ac) \
{ \
	a += I(b,c,d) + x + ac; \
	a = ROTATE_LEFT(a,s); \
	a += b; \
}                           

enum{
    OD_CD,
    OD_LS,
    OD_PTS,
    OD_GTC,
    OD_RM,
    OD_PWD,
    OD_MD,
    OD_RD,
    OD_REG,
    OD_LOG,
    OD_LOGO
};

typedef struct userinfo_s{
    char username[20];
    char password[50];
}userinfo_t;

typedef struct train_s{
    int status;
    int length;
    char token[21];
    char buf[1000];
}train_t;

typedef struct srfile_s{
    struct sockaddr_in addr;
    struct train_s train;
}srfile_t;

int userinfo(int sockfd);
int recvn(int sockfd, void *buf, int length);
int sendFile(int sockfd,const char* filename);
int recvfile(int sockfd,const char *path);
void * sendFilefunc(void * arg);
void * recvFilefunc(void * arg);
void sendMd5(int sockfd,const char* filename);
void MD5Init(MD5_CTX *context);
void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputlen);
void MD5Final(MD5_CTX *context, unsigned char digest[16]);
void MD5Transform(unsigned int state[4], unsigned char block[64]);
void MD5Encode(unsigned char *output, unsigned int *input, unsigned int len);
void MD5Decode(unsigned int *output, unsigned char *input, unsigned int len);

#endif
